Briggs 12 HP Oil in carb
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Briggs 12 HP Oil in carb
Engine runs great a couple of minutes, but chokes down as oil shoots into carb. I changed the diaphragm (Valve cover) that connects to carb with a rubber tube. It ran great for a couple of minutes and then the oil blew back into carb. What could cause this?
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Oil level is OK. Does not smell like gas. Found model no:289707.
The only way I can see that oil can get into the carb is through the tube that connects to the carb from the valve cover (diaphragm). That's what I changed. Why would it blow out again?
The only way I can see that oil can get into the carb is through the tube that connects to the carb from the valve cover (diaphragm). That's what I changed. Why would it blow out again?
#6
Over-speeding of the engine, an open hole (like the dipstick out or dipstick o-ring missing) or excessive crankcase pressure (blowby from bad rings) would be the only realistic reasons.
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The o-ring you are refering to is on the cap of the dipstick or at the bottom where the dipstick housing connects to the fill/drain pipe?
There is no ring blow-by that is visible. It is a low-hour solid engine. Just not run in a couple of years.
There is no ring blow-by that is visible. It is a low-hour solid engine. Just not run in a couple of years.
Last edited by wow65; 03-20-11 at 04:51 AM. Reason: more info
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Apologies!!! Apologies!!!
I went back to shop and re-checked everything and (with my reading glasses on) found that I had read the dipstick incorrectly. It was about a pint over-full. I drained it down to the "full" mark and it is fine. Runs great!!!
Thanks, Cheese.
Without your help, I would not have thought about the over-fill issue.
Have a great day,
Will Walker
I went back to shop and re-checked everything and (with my reading glasses on) found that I had read the dipstick incorrectly. It was about a pint over-full. I drained it down to the "full" mark and it is fine. Runs great!!!
Thanks, Cheese.
Without your help, I would not have thought about the over-fill issue.
Have a great day,
Will Walker